Bidirectional pull-cord switch

Abstract

The utility model relates to the technical field of switches, in particular to a bidirectional pull switch. Comprising a shell, a microswitch is arranged in the shell, the shell is rotationally connected with a transmission shaft, the end, extending out of the shell, of the transmission shaft is connected with a swing arm, a gap is formed between the swing arm and the shell, a channel penetrating through the two sides of the swing arm is formed in the swing arm, a concave table is arranged on one side of the channel, and a baffle is arranged at one end of a switch knob. The baffle is located in the channel, bent pieces are arranged on the two sides of the switch knob, through holes are formed in the bent pieces, a pin shaft is arranged in the concave table, the pin shaft penetrates through the through holes, a positioning plate is arranged on the shell, a boss used for supporting the baffle is arranged on one side of the positioning plate, and the baffle is arranged on the other side of the positioning plate. And a spring for pressing the baffle towards the direction of the shell is arranged between the switch knob and the concave platform. The switch knob does not extend out of the side face of the shell, and the occupied space is small.

Description

TECHNICAL FIELD

[0001] The utility model relates to switch technical field especially relates to a two -way pull rope switch. BACKGROUND

[0002] Two -way pull rope switch is a kind of switch sensor, it is mainly used in the protection device of the emergency stop of equipment field such as conventional belt conveyor, shuttle conveyor, skirt type feeder conveyor, packaging line, horizontal feeder etc. It includes shell, microswitch is arranged in the shell, transmission shaft is rotatably connected to the shell (the cam in the shell is connected with transmission shaft, cam rotation can make microswitch act, it is also provided with reset spring for resetting cam), the end of transmission shaft outside the shell is connected with swing arm, the two ends of swing arm are connected with pull rope respectively, the two pull ropes are respectively extended to the two sides of two -way pull rope switch, when emergency occurs, pull rope is pulled at any place along the line in the field, stop signal can be sent, the protection effect to person and equipment is realized, when the fault is removed, reset handle needs to be pulled, swing arm returns to original state, the reset handle of current two -way pull rope switch is stretched out from the side of shell (as shown in the patent with the name of special two -way pull rope switch of application No. CONTENT OF UTILITY MODEL

[0003] The utility model solves the technical problem existing in the above, and provides a two -way pull rope switch.

[0004] To solve the above technical problem, the technical scheme adopted by the utility model is as follows: a two -way pull rope switch, including shell, microswitch is arranged in the shell, transmission shaft is rotatably connected to the shell, the end of transmission shaft outside the shell is connected with swing arm and there is gap between swing arm and shell, the swing arm is provided with passageway penetrating its two sides, one side of the passageway is provided with recess table, one end of the knob is provided with baffle, the baffle is located in the passageway, the two sides of the knob are provided with bending piece, the bending piece is provided with through -hole, the recess table is provided with pin shaft, the pin shaft passes through the through -hole, the shell is provided with locating plate, one side of the locating plate is provided with the boss for supporting the baffle, the spring for making the baffle press to the direction of shell is arranged between the knob and recess table.

[0005] Further optimize the technical scheme, the spring is torsion spring, the torsion spring is sleeved on the outside of pin shaft, and the two torsion arms of the torsion spring are respectively in contact with the bottom surface of the knob and the recess table.

[0006] Further optimize the technical scheme, the recess table is provided with screw cylinder, the screw cylinder is located at the end of the knob away from the baffle, and the screw bolt can be connected with the screw cylinder to fix the knob.

[0007] Further optimization of the technical scheme, one side of the shell is provided with an outlet.

[0008] Compared with the prior art, the utility model has the advantages that: 1, the one end of the handle is provided with the baffle, the one side of the positioning plate is provided with the boss for supporting the baffle, the spring that is used for making the baffle to the direction of the shell is arranged between the handle and the recess, when the baffle falls off the boss, the swing arm cannot return to the original state, when needing to reset, the one end of the handle far from the baffle needs to be pressed, since the handle does not stretch out from the side of the shell, so the occupied space is smaller, 2, the recess is provided with the screw cylinder, the bolt can be connected with the screw cylinder to fix the handle, so that the pull cord switch can be set to the automatic reset mode. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a structure schematic view of a bidirectional pull cord switch.

[0010] Figure 2 It is a structure schematic view of a shell.

[0011] Figure 3 It is a structure schematic view of a swing arm.

[0012] Figure 4 It is Figure 3 It is an enlarged view of the I place.

[0013] Figure 5 It is Figure 3 It is an enlarged view of the II place.

[0014] In the figure: 1, shell;11, positioning plate;12, boss;13, transmission shaft;2, swing arm;21, handle;211, bent piece;212, pin shaft;213, baffle;22, recess;23, channel;24, screw cylinder;25, bolt. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantage of the utility model more clear and explicit, the utility model is explained in further detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0016] DETAILED DESCRIPTION: in combination with Figures 1-5As shown, a bidirectional pull rope switch comprises a shell 1, a micro switch is arranged in the shell 1, the shell 1 is rotationally connected with a transmission shaft 13, a cam in the shell 1 is connected with the transmission shaft 13, the cam can make the micro switch act by rotation, a reset spring for resetting the cam is further arranged, one end of the transmission shaft 13 extending out of the shell 1 is connected with a swing arm 2 and the swing arm 2 has a gap with the shell 1, the gap is preferably about three millimeters, the swing arm 2 is provided with a channel 23 penetrating through two sides of the swing arm 2, one side of the channel 23 is provided with a recess 22, one end of a pull knob 21 is provided with a baffle 213, the baffle 213 is located in the channel 23, the channel 23 does not hinder the movement of the baffle 213 in use, two sides of the pull knob 21 are provided with bent pieces 211, the bent pieces 211 are provided with through holes, the recess 22 is provided with a pin shaft 212, the pin shaft 212 passes through the through holes, the pull knob 21 can rotate around the pin shaft 212, the shell 1 is provided with a positioning plate 11, Figure 1 When the right side of the upper end of the swing arm 2 contacts with the positioning plate 11, the bidirectional pull rope switch is in the original state and does not send a stop signal, one side of the positioning plate 11 is provided with a boss 12 for supporting the baffle 213, the height of the boss 12 is slightly smaller than the gap between the swing arm 2 and the shell 1, a spring is arranged between the pull knob 21 and the recess 22 to press the baffle 213 towards the shell 1.

[0017] Further, the spring is a torsion spring, the torsion spring is sleeved outside the pin shaft 212, and two torsion arms of the torsion spring respectively contact with the bottom surfaces of the pull knob 21 and the recess 22. Figure 3 And Figure 4 As shown, the torsion spring generates an upward pushing force on the right end of the pull knob 21.

[0018] Further, one side of the shell 1 is provided with a wire outlet for facilitating wiring.

[0019] In normal operation, the bidirectional pull rope switch is in the original state. Figure 1When the state of the switch is in the state of the figure 2, the front side of the baffle 213 is in contact with the back side of the boss 12, and the pull rope is pulled, the swing arm 2 will rotate counterclockwise, and the stop signal is sent out. During the process, the baffle 213 will rotate away from the positioning plate 11 and fall off the boss 12 (and continue to rotate around the transmission shaft 13), the front side of the baffle 213 away from the end of the pin shaft 212 is in contact with the back side of the shell 1. After the pull rope is released, the swing arm 2 rotates clockwise under the action of the return spring, and the baffle 213 cannot continue to rotate when it hits the end of the boss 12 away from the positioning plate 11. When it is necessary to reset, the end of the knob 21 away from the baffle 213 is pressed, so that the baffle 213 is away from the shell 1 and the front side of the baffle 213 is located behind the back side of the boss 12, and the swing arm 2 can continue to rotate to return to the original state. The bidirectional pull rope switch of the application does not need the knob 21 to stretch out from the side of the shell 1, and occupies less space.

[0020] Further, the recess 22 is provided with a screw cylinder 24, the inner wall of the screw cylinder 24 is provided with a screw thread, the screw cylinder 24 is located at the end of the knob 21 away from the baffle 213, and a bolt 25 can be connected with the screw cylinder 24 to fix the knob 21. When it is necessary to automatically reset the swing arm 2, the bolt 25 is connected with the screw cylinder 24, so that the end of the knob 21 away from the baffle 213 is not away from the screw cylinder 24. When it is necessary to manually reset the swing arm 2, the bolt 25 is removed.

Claims

1. A bidirectional pull cord switch, comprising a housing (1), wherein a micro switch is disposed within the housing (1), a drive shaft (13) is rotatably connected to the housing (1), and a swing arm (2) is connected to one end of the drive shaft (13) extending out of the housing (1), and a gap exists between the swing arm (2) and the housing (1), characterized in that: The swing arm (2) is provided with a channel (23) penetrating through both sides thereof, one side of the channel (23) is provided with a recess (22), one end of a knob (21) is provided with a baffle (213), the baffle (213) is located in the channel (23), both sides of the knob (21) are provided with a bent piece (211), the bent piece (211) is provided with a through hole, the recess (22) is provided with a pin shaft (212), the pin shaft (212) penetrates through the through hole, the shell (1) is provided with a positioning plate (11), one side of the positioning plate (11) is provided with a boss (12) for supporting the baffle (213), a spring is arranged between the knob (21) and the recess (22) to press the baffle (213) towards the shell (1).

2. A two-way cord switch according to claim 1, characterized in that: The spring is a torsion spring, the torsion spring is sleeved outside the pin shaft (212), and two torsion arms of the torsion spring are respectively in contact with the bottom surfaces of the knob (21) and the recess (22).

3. A two-way cord switch according to claim 1, characterized in that: The recess (22) is provided with a screw cylinder (24), the screw cylinder (24) is located at one end of the knob (21) away from the baffle (213), and a bolt (25) is connectable with the screw cylinder (24) to fix the knob (21).

4. A two-way cord switch according to any one of claims 1-3, characterized in that: One side of the shell (1) is provided with a wire outlet.

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